Lamp base



FIG. 1 is a perspective view of a lamp base showing my new design;

FIG. 2 is a side elevational view thereof on an enlarged scale, as viewed from any one of the four sides;

FIG. 3 is a top plan view thereof on an enlarged scale;

FIG. 4 is a bottom plan view thereof on an enlarged scale; and

FIG. 5 is a partial vertical sectional view thereof on an enlarged scale, taken along line 5--5 of FIG. 3.

The post and socket in FIGS. 1 and 2 are shown in broken line for illustrative purposes only. 

The ornamental design for a lamp base, as shown and described. 